A machine with the latest build of Acronis Trueimage 11 has twice crashed with a Blue Screen of Death while creating a nightly backup image to an external USB2 hard drive. After the first time, we ran a full pass of CHKDSK on both the machine's internal drive and the USB drive, checking for bad blocks as well as directory problems. No trouble found. The most recent occurrence of this was last night. The following was logged in the machine's System Event Log: Source: System Error Event ID 1003 Error code 000000f4, parameter1 00000003, parameter2 89c498d0, parameter3 89c49a44, parameter4 805fa160. We're running the latest build of the software as of the time of writing, and Windows XP Service Pack 3 and all subsequent updates are installed. Can you please suggest where we might go from here?